Americans must support a massive bail-out of financial markets to ease a “serious financial crisis”, US President George W Bush has said.
The entire economy was in danger, he said in a live TV speech, and failure to act now would cost more later.
He has invited presidential rivals John McCain and Barack Obama to the White House on Thursday to discuss the $700bn (£378bn) rescue package.
The rivals have disagreed on delaying a TV debate over the economic turmoil.
Mr McCain says he is suspending his campaign to help with the crisis, but Mr Obama says voters now need to hear from the candidates more than ever.